package com.csust.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.csust.reggie.mapper.DishMapper;
import com.csust.reggie.service.IDishFlavorService;
import com.csust.reggie.common.CustomException;
import com.csust.reggie.domain.Dish;
import com.csust.reggie.domain.DishFlavor;
import com.csust.reggie.dto.DishDto;
import com.csust.reggie.service.IDishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

@Service
@Slf4j
public class IDishServiceImpl extends ServiceImpl<DishMapper, Dish> implements IDishService {

    @Autowired
    private IDishFlavorService dishFlavorService;

    /**
     * 新增菜品，同时保存对应的口味数据
     * @param dishDto
     */
    @Transactional
    public void saveWithFlavor(DishDto dishDto) {
        //保存菜品的基本信息到菜品表dish
        this.save(dishDto);

        Long dishId = dishDto.getId();//菜品id

        //菜品口味
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors = flavors.stream().map((item) -> {
            item.setDishId(dishId);
            return item;
        }).collect(Collectors.toList());

        //保存菜品口味数据到菜品口味表dish_flavor
        dishFlavorService.saveBatch(flavors);

    }

    /**
     * 根据id查询菜品信息和对应的口味信息
     * @param id
     * @return
     */
    public DishDto getByIdWithFlavor(Long id) {
        //查询菜品基本信息，从dish表查询
        Dish dish = this.getById(id);

        DishDto dishDto = new DishDto();
        BeanUtils.copyProperties(dish,dishDto);

        //查询当前菜品对应的口味信息，从dish_flavor表查询
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId,dish.getId());
        List<DishFlavor> flavors = dishFlavorService.list(queryWrapper);
        dishDto.setFlavors(flavors);

        return dishDto;
    }

    @Override
    @Transactional
    public void updateWithFlavor(DishDto dishDto) {
        //更新dish表基本信息
        this.updateById(dishDto);

        //清理当前菜品对应口味数据---dish_flavor表的delete操作
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper();
        queryWrapper.eq(DishFlavor::getDishId,dishDto.getId());

        dishFlavorService.remove(queryWrapper);

        //添加当前提交过来的口味数据---dish_flavor表的insert操作
        List<DishFlavor> flavors = dishDto.getFlavors();

        flavors = flavors.stream().map((item) -> {
            item.setDishId(dishDto.getId());
            return item;
        }).collect(Collectors.toList());

        dishFlavorService.saveBatch(flavors);
    }

    /**
     *  删除菜品信息
     * @param lds
     */
    @Override
    public void removeWithFlavor(List<Long> lds) {
        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper = new LambdaQueryWrapper<>();
        dishLambdaQueryWrapper.in(Dish::getId,lds);
        dishLambdaQueryWrapper.eq(Dish::getStatus,1);
        int count = this.count(dishLambdaQueryWrapper);

        if (count > 0) {
            // 表示商品正在预售
            throw new CustomException("菜品正在预售，无法删除");
        }

        this.removeByIds(lds);

        LambdaQueryWrapper<DishFlavor> dishFlavorLambdaQueryWrapper = new LambdaQueryWrapper<>();
        dishFlavorLambdaQueryWrapper.in(DishFlavor::getDishId,lds);
        // 删除菜品和口味的绑定关系
        dishFlavorService.remove(dishFlavorLambdaQueryWrapper);
    }

    /**
     *  批量修改
     * @param status
     * @param ids
     */
    @Override
    public void updateDishStatus(int status, List<Long> ids) {
        // 先把要修改状态的查询出来之后
        LambdaQueryWrapper<Dish> wrapper = new LambdaQueryWrapper<>();
        wrapper.in(Dish::getId,ids);
        List<Dish> list = this.list(wrapper);

        // 在进行设置新的状态
        list.stream().map((item) -> {
            item.setStatus(status);
            return item;
        }).collect(Collectors.toList());

        // 批量修改操作
        this.updateBatchById(list);
    }
}
